Patent Yard Sign in
Expired European patentEurope

Electric discharge machining device

EP 0657243 B1 · Applicant: SODICK CO., LTD.

EPO PDF

Overview

The published document from the EPO: abstract, claims, description and drawings. Open it full size

Read the whole patent

Listed from its EPO record in Patent Yard's archive of European patents past their term. Its claims, description and drawings are in the EPO PDF and on Google Patents, and the Claude kit works from them.

Google PatentsEPO PDF

Why it's free to use

  • Filed June 16, 1994 and granted July 30, 1997. A European patent lasts at most 20 years from filing, so its term ended June 16, 2014.
  • A supplementary protection certificate, which can extend a medicine or crop-protection patent, adds at most five and a half years, so even that would have ended by December 16, 2019.
  • We check European rights only. A US or other national patent in its family could still be in force: check its family on Espacenet or Google Patents.
FiledJune 16, 1994
PublishedJune 14, 1995
GrantedJuly 30, 1997
Term endedJune 16, 2014
Application numberEP 94918534
Classification (CPC)B23H7/02 +1 more

Timeline

Timeline From EPO dates

1995199719992001200320052007200920112013Application filedJune 16, 1994PublishedJune 14, 1995Patent grantedJuly 30, 1997Term endedJune 16, 2014

Sources & verification

Official EPO records

Full published documentClaims, description and drawings as a PDF.EPOEuropean Patent RegisterProcedure, status, file inspection and legal events.EPOLinked open EP data recordThe bibliographic record this page is built from.EPO

Cross-check elsewhere

Google PatentsFull text, worldwide family, citing patents and legal events.patents.google.comEspacenetNational family members and their legal status.European Patent Office

Everything on this page comes from the EPO record linked above. EPO data used under CC BY 4.0.